RE: [amibroker] Newbie Problem Looping the last 15 days. It maybe me. Maybe AMI broker.

["Terry" <MagicTH@xxxxxxxxxxx>]

You are using subscripts [0] in AddColumn. They should not be there.

Normally Filter = 1; to see all bars of data, or Filter = Buy; to see
only bars with Buy signals. You can certainly do Filter = C > 4.0 to see
only bars where the Close is greater than 4.0. You can even use Filter >
barCount - 15; to see just the last 15 days of AddColumn(), but you must
remove all the subscripts[0]. All you need is the first
AddColumn(Close,"Close"); which shows all bars that match the Filter.

You can also Explore just the last 15 days in AA by setting n bars or
last n days to 15, same results on a daily database, different if using
intraday data, and setting Filter = 1; 
--
Terry
-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On
Behalf Of bestbobleonard
Sent: Saturday, November 11, 2006 08:58
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Newbie Problem Looping the last 15 days. It maybe
me. Maybe AMI broker.

Hi,


I want to back test the last 15 days (ONLY) for some data anomalies 
like gapup, etc. I have a simple (STARTER!) function for this 
below.  I'm beginning to think I don't see array processing 
correctly. 

I did read the manual on arrays and it's not clear on some points so 
finally I did the following:

Filter =  (Close[0] > 4.0)  ;


AddColumn(Close, "Close");
AddColumn(Close[0], "Close0");
AddColumn(Close[1], "Close1");
AddColumn(Close[2], "Close2");


Which gets:
Ticker	Date/Time	Close	close1	close2	close3	close4	
JCP	11/9/2006	79.55	53.75	52.21	53.40	54.18	


Clearly, I'm not getting correct elemens of the array. The values 
shhould all be it ther $70's. Maybe I misunderstood the
Manual but the page on arrays is skimpy and poorly written.


Maybe someone can just point me to some better 
examples/documentation.

I read it that "close[0] equals day1 in his tables??"

I'm using QP3.

Or maybe show me what's wrong with the below function.

Thanks for Any suggestions,
BobLenard (programming newbie)


// *************************
////


function Dropper(period)
{ 
yesno = 0;

global dropdelta;

dropdelta[0] = 0; //initaliation & needed for debug!

  for (i = 1; i <= 15; i++)
   {
    dropdelta [i] =  High[i] -  Low [i +1 ] ;
   }


  for (j = 1; j <= period; j++)
   {
    if ( dropdelta[ j ] < 0)
     yesno = 1;
   }

return yesno;

}


gotadrop = Dropper(15);


Filter =  (Close[0] > 4.0)  ;

AddColumn(Close, "Close");

AddColumn(dropdelta[1], "dtest1");

AddColumn(dropdelta[2], "dtest2");

AddColumn(dropdelta[3], "dtest3");

AddColumn(dropdelta[4], "dtest4");







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